From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 02 Jul 2008 12:30:39 +0900 From: KOSAKI Motohiro Subject: Re: [resend][PATCH -mm] split_lru: fix pagevec_move_tail() doesn't treat unevictable page In-Reply-To: <28c262360807011739w5668920buf7880de6ed30f912@mail.gmail.com> References: <20080701093840.07b48ced@bree.surriel.com> <28c262360807011739w5668920buf7880de6ed30f912@mail.gmail.com> Message-Id: <20080702122850.380B.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: MinChan Kim Cc: kosaki.motohiro@jp.fujitsu.com, Rik van Riel , LKML , linux-mm , Lee Schermerhorn , Andrew Morton List-ID: Hi Kim-san, > Hi, Rik and Kosaki-san > > I want to know exact race situation for remaining git log. > As you know, git log is important for me who is newbie to understand source > > There are many possibility in this race problem. > > Did you use hugepage in this test ? > I think that If you used hugepage, it seems to happen following race. I don't use hugepage. but use SYSV-shmem. so following scenario is very reasonable. OK. I resend my patch with following description. > > -------------- > > CPU1 CPU2 > > shm_unlock > scan_mapping_unevictable_pages > check_move_unevictable_page > ClearPageUnevictable rotate_reclaimable_page > > PageUnevictable(page) return 0 > SetPageUnevictable > list_move(LRU_UNEVICTABLE) > > local_irq_save > > pagevec_move_tail > > Do you think it is possible ? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org